Home / 1,918.06-2,647-1,172.35

Finding the Fourth Proportional to 1,918.06, 2,647 and 1,172.35

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Solution

The fourth proportional to 1,918.06, 2,647 and 1,172.35 is: 1,617.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.06 : 2,647 = 1,172.35 : x
  2. Step 2: Convert to fraction form
    1,918.06/2,647 = 1,172.35/x
  3. Step 3: Cross multiply
    1,918.06x = 2,647 × 1,172.35
  4. Step 4: Simplify right side
    1,918.06x = 3,103,210.45
  5. Step 5: Solve for x
    x = 3,103,210.45/1,918.06
  6. Step 6: Final answer
    x = 1,617.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.